Package net.sf.saxon.pattern

Class NameTest

  • All Implemented Interfaces:
    NodePredicate, QNameTest, ItemType, ItemTypeWithSequenceTypeCache
    public class NameTest
extends NodeTest
implements QNameTest
    NodeTest is an interface that enables a test of whether a node has a particular name and type. A NameTest matches the node kind and the namespace URI and the local name. Note that unlike the XPath production called NameTest, this is a test for a specific name, and does not include wildcard matches.

    • Constructor Detail

      • NameTest

        public NameTest​(int nodeKind,
                java.lang.String uri,
                java.lang.String localName,
                NamePool namePool)
        Create a NameTest to match nodes by name
        Parameters:
        nodeKind - the kind of node, for example Type.ELEMENT
        uri - the namespace URI of the required nodes. Supply "" to match nodes that are in no namespace
        localName - the local name of the required nodes. Supply "" to match unnamed nodes
        namePool - the namePool holding the name codes
        Since:
        9.0

      • NameTest

        public NameTest​(int nodeKind,
                int nameCode,
                NamePool namePool)
        Create a NameTest to match nodes by their nameCode allocated from the NamePool
        Parameters:
        nodeKind - the kind of node, for example Type.ELEMENT
        nameCode - the nameCode representing the name of the node
        namePool - the namePool holding the name codes
        Since:
        8.4

      • NameTest

        public NameTest​(int nodeKind,
                NodeName name,
                NamePool pool)
        Create a NameTest to match nodes by name
        Parameters:
        nodeKind - the kind of node, for example Type.ELEMENT
        name - the name of the nodes that this NameTest will match
        pool - the namePool holding the name codes
        Since:
        9.4

    • Method Detail

      • getNamePool

        public NamePool getNamePool()
        Get the NamePool associated with this NameTest
        Returns:
        the NamePool

      • getNodeKind

        public int getNodeKind()
        Get the node kind that this name test matches
        Returns:
        the matching node kind

      • getUType

        public UType getUType()
        Get the corresponding UType. A UType is a union of primitive item types.
        Specified by:
        getUType in interface ItemType
        Returns:
        the smallest UType that subsumes this item type

      • matches

        public boolean matches​(int nodeKind,
                       NodeName name,
                       SchemaType annotation)
        Test whether this node test is satisfied by a given node. This method is only fully supported for a subset of NodeTests, because it doesn't provide all the information needed to evaluate all node tests. In particular (a) it can't be used to evaluate a node test of the form element(N,T) or schema-element(E) where it is necessary to know whether the node is nilled, and (b) it can't be used to evaluate a node test of the form document-node(element(X)). This in practice means that it is used (a) to evaluate the simple node tests found in the XPath 1.0 subset used in XML Schema, and (b) to evaluate node tests where the node kind is known to be an attribute.
        Specified by:
        matches in class NodeTest
        Parameters:
        nodeKind - The kind of node to be matched
        name - identifies the expanded name of the node to be matched. The value should be null for a node with no name.
        annotation - The actual content type of the node
        Returns:
        true if the node matches this node test

      • getMatcher

        public IntPredicateProxy getMatcher​(NodeVectorTree tree)
        Description copied from class: NodeTest
        Get a matching function that can be used to test whether numbered nodes in a TinyTree or DominoTree satisfy the node test. (Calling this matcher must give the same result as calling matchesNode(tree.getNode(nodeNr)), but it may well be faster).
        Overrides:
        getMatcher in class NodeTest
        Parameters:
        tree - the tree against which the returned function will operate
        Returns:
        an IntPredicate; the matches() method of this predicate takes a node number as input, and returns true if and only if the node identified by this node number matches the node test.

      • test

        public boolean test​(NodeInfo node)
        Test whether this node test is satisfied by a given node. This alternative method is used in the case of nodes where calculating the fingerprint is expensive, for example DOM or JDOM nodes.
        Specified by:
        test in interface NodePredicate
        Overrides:
        test in class NodeTest
        Parameters:
        node - the node to be matched
        Returns:
        true if the node test is satisfied by the supplied node, false otherwise

      • matches

        public boolean matches​(StructuredQName qname)
        Test whether the NameTest matches a given QName
        Specified by:
        matches in interface QNameTest
        Parameters:
        qname - the QName to be matched
        Returns:
        true if the name matches

      • getDefaultPriority

        public final double getDefaultPriority()
        Determine the default priority of this node test when used on its own as a Pattern
        Specified by:
        getDefaultPriority in interface ItemType
        Specified by:
        getDefaultPriority in class NodeTest
        Returns:
        the default priority for the pattern

      • getFingerprint

        public int getFingerprint()
        Get the fingerprint required
        Overrides:
        getFingerprint in class NodeTest

      • getMatchingNodeName

        public StructuredQName getMatchingNodeName()
        Get the name of the nodes matched by this nodetest, if it matches a specific name. Return null if the node test matches nodes of more than one name
        Overrides:
        getMatchingNodeName in class NodeTest

      • getPrimitiveType

        public int getPrimitiveType()
        Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Type.NODE
        Specified by:
        getPrimitiveType in interface ItemType
        Overrides:
        getPrimitiveType in class NodeTest
        Returns:
        the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT

      • getRequiredNodeNames

        public java.util.Optional<IntSet> getRequiredNodeNames()
        Get the set of node names allowed by this NodeTest. This is returned as a set of Integer fingerprints. A null value indicates that all names are permitted (i.e. that there are no constraints on the node name. The default implementation returns null.
        Overrides:
        getRequiredNodeNames in class NodeTest
        Returns:
        the set of integer fingerprints of the node names that this node test can match; or absent if the set of names cannot be represented (for example, with the name tests *:xxx or xxx:*)

      • getNamespaceURI

        public java.lang.String getNamespaceURI()
        Get the namespace URI matched by this nametest
        Returns:
        the namespace URI (using "" for the "null namepace")

      • getLocalPart

        public java.lang.String getLocalPart()
        Get the local name matched by this nametest
        Returns:
        the local name

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • hashCode

        public int hashCode()
        Returns a hash code value for the object.
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals​(java.lang.Object other)
        Determines whether two NameTests are equal
        Overrides:
        equals in class java.lang.Object

      • getFullAlphaCode

        public java.lang.String getFullAlphaCode()
        Description copied from interface: ItemType
        Get the full alpha code for this item type. As well as the basic alpha code, this contains additional information, for example element(EFG) has a basic alpha code of NE, but the full alpha code of NE nQ{}EFG.
        Specified by:
        getFullAlphaCode in interface ItemType
        Returns:
        the alpha code for the type

      • exportQNameTest

        public java.lang.String exportQNameTest()
        Export the QNameTest as a string for use in a SEF file (typically in a catch clause).
        Specified by:
        exportQNameTest in interface QNameTest
        Returns:
        a string representation of the QNameTest, suitable for use in export files. The format is a sequence of alternatives separated by vertical bars, where each alternative is one of '*', '*:localname', 'Q{uri}*', or 'Q{uri}local'.

      • generateJavaScriptNameTest

        public java.lang.String generateJavaScriptNameTest​(int targetVersion)
        Generate Javascript code to test if a name matches the test.
        Specified by:
        generateJavaScriptNameTest in interface QNameTest
        Parameters:
        targetVersion - the version of SaxonJS being targeted
        Returns:
        JS code as a string. The generated code will be used as the body of a JS function in which the argument name "q" is an XdmQName object holding the name. The XdmQName object has properties uri and local.

      • explainMismatch

        public java.util.Optional<java.lang.String> explainMismatch​(Item item,
                                                            TypeHierarchy th)
        Get extra diagnostic information about why a supplied item does not conform to this item type, if available. If extra information is returned, it should be in the form of a complete sentence, minus the closing full stop. No information should be returned for obvious cases.
        Specified by:
        explainMismatch in interface ItemType
        Overrides:
        explainMismatch in class NodeTest
        Parameters:
        item - the item that doesn't match this type
        th - the type hierarchy cache
        Returns:
        optionally, a message explaining why the item does not match the type